I´ve heard that getting high ranking PR1 sites to link to "my site" is important in marketing.
(and its even better if that PR1 site has relevant content to "my site".
But how about forum signatures?, I assume that this site is a PR1 site (at least when the keywords are about internet marketing) and if I post 10 forum signatures it means I will have 10 PR1 links if I post my web site link in my signature.
So why is there a need to get/buy PR1 links if you can get it free this way,
are others factors concerned, or am I right?